Materials2026-01-211 minarXiv:2601.14627expressA Thin Film Turns into a FerroelectricA cube of potassium tantalate behaves like an ordinary dielectric: it doesn't store an electric field. But grow this material as a thin film on a substrate of another crystal, and everything changes.Tobias Schwaigert·Salva Salmani-Rezaie·Sankalpa Hazra·Utkarsh Saha·Maya Ramesh·Aiden Ross·Betul Pamuk·Long-Qing Chen·David A. Muller·Darrell G. Schlom·Venkatraman Gopalan·Kaveh Ahadigraphene👍👎☆SimplePopularAdvanced